Manman, a four-year-old girl with the ability to communicate with water and animals, was abandoned by her birth mother due to her special power and rescued by poor fisherman Lin Hai while drifting in a wooden basin. The Lin family took her in, and Manman relied on her ability to repeatedly warn of danger and guide her family to treasure grounds of fishery products. Black-hearted businessman Boss Pan and others coveted the catch and tried every means to suppress them, blocking roads, cutting off ice, and attempting to pollute the water area. The Lin family did not fear authority, using the back mountain subterranean river and ancient saltpeter methods to resolve crises and defeat the opponents' plot. Afterwards, Lin Hai set up a village-run canned fish factory, going through difficulties such as lack of raw materials, power outages, road damage, and qualification doubts, and won investment with superior products, driving the whole village to work and get rich.